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A046362 Composite palindromes divided by the palindromic sum of their prime factors is a palindrome (counted with multiplicity). 2
4, 1345431, 12333321, 1425665241, 12026255262021, 35686666668653, 40181955918104, 128449444944821, 146426787624641, 651751101157156, 1734573883754371, 2313421221243132, 6858874224788586, 9889882002889889, 12446686768664421, 23265253035256232, 30153338083335103 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Giovanni Resta, Table of n, a(n) for n = 1..39 (terms < 10^19)

EXAMPLE

1345431 = 3 * 17 * 23 * 31 * 37 -> Sum of factors is palindrome 111 -> 1345431 / 111 = 12121 and quotient is also palindromic.

CROSSREFS

Cf. A046358, A046361.

Sequence in context: A124119 A090096 A218484 * A144122 A058424 A204041

Adjacent sequences:  A046359 A046360 A046361 * A046363 A046364 A046365

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Jun 15 1998

EXTENSIONS

Edited name and a(5)-a(12) from Donovan Johnson, Oct 11 2011

a(13)-a(17) from Giovanni Resta, Nov 01 2019

STATUS

approved

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Last modified October 22 10:18 EDT 2020. Contains 337950 sequences. (Running on oeis4.)